JP2009270398A - Hand jack - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact, user-friendly and economical hand jack capable of raising a steel sash frame located in a chipped hole without causing damages on the steel sash frame, capable of being operated to freely adjust vertical height to a target position and also capable of being operated to make easy positional adjustment in the back and forth/right and left directions. <P>SOLUTION: The height in the lowering direction can be continuously adjusted by turning an adjustment handle 14 provided at the rear end of a rod 3 of the hand jack 1. A support section 9 is provided at the tip end of an arm 3. The support section 9 can be lowered to a position lower than a base 12 fixed to the tip end of the rod 3, and a protective member 10 for preventing an object to be raised from being damaged is provided on the base end section of the arm 3. The object to be raised is supported at two points, i.e., the protective member 10 and the support section 9. Therefore, the object can be stably held on the support section 9 to maintain a posture in parallel with the object. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a hand jack, and more particularly, to a hand jack configured to be appropriately adjusted to a target height or position when a steel joinery frame is attached in a place where a concrete floor is curled.

   If there is an installation error of several millimeters for a steel joinery frame, it will not be possible to open and close smoothly when the door is installed later, and it will not be locked. The installation of steel joinery frames requires accuracy.

   FIG. 11 shows a temporary installation of the steel joinery frame 31, and a part of the floor is rolled up by the opening 36 of the lightweight steel wall base 34 assembled on the concrete floor 37, and the steel is made into the hole 33. The lowermost part of the joinery frame 31 is dropped and tied with a string 35 so as not to fall down. From this state, a wooden wedge or a flat plate is used at the lower portion H of the steel joinery frame 31 to adjust the steel joinery frame 31 to a desired height and position.

  FIGS. 12, 13, and 14 are obtained by taking one of the H portions in FIG. 11 as an example. As shown in FIG. 12, the method of adjusting the frame by the wedge in the hollow hole 33 causes the steel joinery frame 31 to slide down in the opposite direction in order to support the wedge 41 from an oblique direction. As shown, the wedge 42 is not supported from the opposite side to stabilize. In this way, the height is increased, but as shown in FIG. 14, in order to adjust the frame to a predetermined position in the vertical direction AB, the longitudinal CD, and the lateral EF direction, the wedge 41 from several directions, 42 and 43 and the flat plate 51 are supported. The state in which the adjustment to the target position is completed in this way is a temporarily fixed state when the wedge is used before being fixed by the arc welding work. After adjusting to the temporarily fixed state, a method is adopted in which the welding band 32 provided on the back side of the steel fitting frame 31 and the lightweight steel wall base 34 are fixed by arc welding using a reinforcing bar.

  However, as shown in FIG. 14, supporting the wedge from several diagonal directions makes the steel joinery frame 31 in a more stable temporarily fixed state and causes some vibration to the welding band 32 during welding work. However, the steel joinery frame 31 has the advantage that it is difficult to be displaced, but on the other hand, it obstructs the field of view of the welding band 32 and hinders the welding work, and causes other problems as follows. ing. In other words, in order to adjust the steel joinery frame 31 to the target position, the position must be accurately aligned with respect to the three directions of upper and lower AB, front and rear CD, and left and right EF. If it is performed on the top, it is stable when a plurality of wedges are in contact with the lower part of the steel joiner frame 31, but the balance is broken and the height and position are changed by moving the steel joiner frame 31 a little. . Therefore, it takes a considerable amount of time to adjust to the target position while making fine adjustments by repeating these operations, and it can be said that the use state is not preferable in view of such trouble.

  In addition to the above-mentioned contents, if a wedge is used from an oblique direction so as to support the weight of the steel joinery frame 31, the shape of the wedge may break because the tip is thin, and the consumption of the wedge is accelerated, which is economical. It's not an efficient method.

  The concrete floor surface 37 is also provided with a base ink line 38 as a reference for determining the positions of the front and rear CDs and the left and right EFs of the steel joinery frame 31. When measuring the length, there was a problem that it was difficult to measure because of the wedge.

Further, as shown in FIG. 15, the conventional hand jack 101 is configured to place an object on the arm and lift it, so the arm 103 is provided horizontally so that the object does not slide down. The size corresponding to was required. Therefore, if the base 104 having a small shape is used, the jack body 102 is tilted and the object on which it is placed slips, so that a size proportional to the arm is required and the structure is difficult to fall down. Further, in the raising direction, the operation can be freely performed including the fine adjustment steplessly by the operation of the movable lever 105 or the operation method using the fine adjustment screw 106 contacting the movable lever 105. However, since a mechanism for fine adjustment in the lowering direction is not configured, there has been a lack of measures for adjustment in the case of excessive adjustment. For these reasons, it has been difficult to lift and adjust the steel fitting frame inside the narrow hole.
Registered Utility Model Publication No. 3006549

  The present invention has been made in view of the above-described background art and the existence of problems of the background art, and uses a hand jack to damage a steel joinery frame in a hollow hole portion. It can be lifted up and down, is compact, easy to use, economical, and can be easily adjusted to the desired position by manipulating the height in the vertical direction as well as easily adjusting the position in the front and rear, left and right directions. It is an object to provide a hand jack that can be used.

In order to solve the above-mentioned problem, the invention described in claim 1 is capable of lifting the object steplessly by feeding the rod by rotating the movable lever, and at the same time maintaining its height. In the type of hand jack,
In the hand jack, the main body of the jack, the body part located in the center,
A grip extending in a horizontal direction from a rear portion of the body portion;
An arm located on the front side of the body portion and extending obliquely downward at a steep angle;
Of these, a round rod-shaped rod having a predetermined length is passed through the body portion,
A fixing plate fixed to a predetermined position inside the body portion and inserted into the rod;
A large spring inserted into the rod at a position above the fixed plate;
A feed plate located on top of the spring and inserted into the rod;
A rod feed mechanism section comprising a movable lever for moving the feed plate in a predetermined direction and feeding the rod in a predetermined direction;
A small spring located at the top of the body and inserted into the rod;
A stopper plate located at the top of the small spring and inserted into the rod;
A stopper mechanism portion comprising a support fitting located at one end of the stopper plate and rotatably connecting the stopper plate is configured.
The hand jack is characterized in that a base is fixed to the tip of the rod, and an adjustment handle is provided at the other rear end for rotating the rod to slightly displace the rod. .

  According to a second aspect of the present invention, in the hand jack according to the first aspect, the adjustment provided at the rear end of the rod when an object to be lifted by the turning operation of the movable lever is raised too much from a target height. A hand jack characterized in that it can be adjusted steplessly in a stepless manner by turning a handle in a circumferential direction.

  According to a third aspect of the present invention, in the hand jack according to the second aspect, a support portion that is a portion to be hooked on an object is formed at the tip of the arm, and the support portion is fixed to the tip of the rod. A hand jack characterized by being configured to be freely lowered to a position lower than the existing base.

  According to a fourth aspect of the present invention, in the hand jack according to any one of the first to third aspects, a protective material is attached to the base of the arm so as not to damage the object to be lifted, A hand jack configured to maintain a parallel posture with respect to an object to be lifted by lifting with a two-point support of a protective material and the support portion.

  The invention described in claim 5 is the hand jack described in any one of claims 1 to 4, wherein the base fixed to the tip of the rod is detachable, and the state of the object to be lifted or the floor It is the hand jack characterized by being comprised so that it can replace | exchange according to.

  According to a sixth aspect of the present invention, in the hand jack according to any one of the first to fifth aspects, the hand jack of the present invention is placed sideways so that the arm located on the front side of the jack body is the lower surface. Then, when the support portion is installed so as to be hooked on an anchor bolt fixed to the floor surface, the rod placed by the turning operation of the movable lever is pushed to push the object placed on the tip of the base. This is a hand jack that is configured so that

  According to the hand jack of the present invention, it is configured so that the parallel posture can be maintained without damaging the object to be lifted by the protective material attached to the base portion of the arm. It has become. Lifting with two-point support of the support part and the protective material, the support part is held in a stable state, the support part has a small shape that can be hooked on the lower part of the steel fitting frame, and the arm is also steep It is provided at a gradient angle. Therefore, it is possible to insert the support part from the slight gap of the hollow hole and hook it to the lower part of the steel joinery frame.

  In addition, it is possible to smoothly lift the steel joiner frame with the lowermost part dropped into the punched hole without scratching it by rotating the movable lever, and simultaneously maintain its height. In addition, the height can be adjusted freely, including fine adjustments, in both the vertical and vertical directions within the hole, so that it can be easily adjusted to the desired height and the height is maintained. The position can be easily adjusted by moving the base position back and forth and left and right in this state. Moreover, since it is a tool that can be easily removed from the steel joiner frame after being attached by arc welding work, it is possible to form a compact shape corresponding to the hole.

  The use of the hand jack eliminates the need for a wedge to support the weight of the steel joinery frame, so that the tip of the wedge is not damaged and it is economical. However, if it is necessary to make the position of the steel joinery frame difficult to shift during the welding operation, it is possible to support the wedge to the extent that it is lightly touched after the setting to the target position is completed.

Also, when lifting the steel joiner frame, the hand jack is placed at the center with respect to the opening. When using one, it is near the center of gravity of the steel joiner frame, and when using two, the steel joiner is used. Near both ends of the frame. This position is a position that does not affect the welding operation. Since the hand jack is compact in shape, it can be installed at a position where it does not hinder the measurement from the inking line to the steel joinery frame even if a plurality of hand jacks are used.
From the above, it is possible to provide a compact hand jack with good operability.

  Hereinafter, the hand jack according to the present invention will be described in detail with reference to the first embodiment and the second embodiment shown in FIGS.

  The hand jack 1 according to the present embodiment is of a type that can lift the object in a stepless manner and maintain the height at the same time by feeding the rod 3 by rotating the movable lever 5. It is a hand jack.

[Embodiment 1]
FIG. 1 is a perspective view showing a hand jack according to the present invention. Referring to FIG. 1, a hand jack 1 has a trunk portion 2 located at the center of a jack body 25, and a predetermined passage through the trunk portion 2. As shown in FIG. A rod 3 made of a round bar-like member having a length of 1 mm, a grip 4 extending in a horizontal direction from a rear portion of the body 2, and a movable fulcrum 24 by a pivot pin 6 provided at the base of the grip 4. A protective material 10 is attached to a lever 5, an arm 8 that is located on the front side of the body portion 2 and extends obliquely downward at a steep angle, and a base portion of the arm 8 with an attachment screw 11.

  A base 12 detachably attached to the tip of the rod 3 is fixed by a nut 13. An adjustment handle 14 described later is provided at the rear end of the rod 3.

  The base of the movable lever 5 is formed so as to straddle the feed plate 20 and has a feed pin 7 above it.

  A support portion 9 is formed at the tip of the arm 8 to be hooked on an object, and is bent at an acute angle.

  A support fitting 15 having a through hole 16 is provided at the base end of the arm 8. A stopper plate 17 having a through hole 18 at the center and having one end enlarged and not pulled out is passed through the through hole 16 of the support fitting 15. A small spring 19 is provided between the stopper plate 17 and the body portion 2. The rod 3 is inserted into the inside of the small spring 19 and the through hole 18 of the stopper plate 17. The part described in this paragraph is a stopper mechanism part to be described later.

  A feed plate 20 having a through hole 21 at the center is provided inside the body portion 2. A fixed plate 22 is fixed below the feed plate 20 so as to penetrate the rod 3. A large spring 23 is provided between the feed plate 20 and the fixed plate 22. The rod 3 is inserted into the inside of the large spring 23 and the through holes 21 of the feed plate 20 and the fixed plate 22. The portion described in this paragraph is referred to as a rod feed mechanism portion described later. The present invention is configured as described above.

  Next, the operation content of the stopper mechanism portion of the hand jack 1 configured as described above will be described. FIG. 2 shows a state when the stopper mechanism is not in operation. The stopper plate 17 that is passed through the support fitting 15 is connected to the through hole 16 so as to be rotatable. However, it is lifted so as to be inclined in response to the urging force of the small spring 19 located below the stopper plate 17. Therefore, the rod 3 is sandwiched between the edges of the through holes 18 provided in the stopper plate 17 and is always in a state of receiving a frictional force. As the stopper plate 17 approaches the state perpendicular to the rod 3, the frictional force applied to the rod 3 is weakened. On the other hand, when the inclination is increased, the force for clamping the rod 3 acts strongly and the frictional force is increased. Currently, the direction in which the rod 3 is fed downward is a direction in which the stopper plate 17 approaches a state perpendicular to the rod 3, and the direction in which the rod 3 is fed upward is a direction in which the inclination of the stopper plate 17 increases. . For this reason, the rod 3 can be fed downward but cannot be moved backward.

  FIG. 3 shows a state during operation of the stopper mechanism. When the stopper plate 17 is pushed down, the stopper plate 17 becomes perpendicular to the rod 3, the frictional force due to the edge of the through hole 18 is released, the rod 3 becomes free, and can be sent upward. become. The stopper mechanism is configured as described above.

  Next, the operation content of the rod feed mechanism portion of the hand jack 1 configured as described above will be described. FIG. 4 shows a state when the rod feed mechanism is not in operation. The fixed plate 22 is fixed as a reinforcing member for the body portion 2, and is a plate that holds one end of the large spring 23. A large spring 23 on the fixed plate 22 is a spring that biases the feed plate 20. The feed plate 20 is provided so as to freely move in the vertical direction, but is lifted horizontally by the urging force of the large spring 23 and pushes up the feed pin 7 at the end. For this reason, the movable lever 5 is kept open with respect to the grip 4 via the rotation fulcrum 24. At this time, the rod 3 is in a free state because it is not affected by the frictional force caused by the edge of the through hole 21 of the feed plate 20.

  FIG. 5 shows a state during operation of the rod feed mechanism. When the movable lever 5 is pulled up, the feed pin 7 is rotated downward via the rotation fulcrum 24. Accordingly, since the feed pin 7 is in contact with the end of the feed plate 20, the feed plate 20 is inclined and moves downward. When the feed plate 20 is in an inclined state, the force to pinch the rod 3 works by the edge of the through hole 21 as described above, and the rod 3 moves in the same manner as the feed plate 20 by receiving this frictional force. It can be sent downward. The rod feed mechanism is configured as described above. Accordingly, the rod 3 can be sent out by the turning operation of the movable lever 5, and depending on the operation, it can be sent out in a stepless manner, and the sent out rod 3 can be maintained without going backward. Yes.

  Next, an operation procedure and a use situation when the steel joinery frame is lifted using the hand jack 1 configured as described above will be described. The steel joinery frames shown in the first embodiment are all in the state shown in FIG. 11, and one of the H portions is taken as an example. In one embodiment shown in FIG. 6, first, the stopper plate 17 is pushed down to raise the rod 3 to a position where the base 12 does not interfere with the concrete floor surface 37. And the support part 9 is inserted in the clearance gap 33 and hooked on the lowermost part of the steel joinery frame 31. Next, the movable lever 5 is pulled up to feed the rod 3 downward. When the base 12 provided at the tip of the rod 3 comes into contact with the concrete floor surface 37, when the weight of the steel joinery frame 31 is applied to the support portion 9, the jack body 25 may fall in the direction of the steel joinery frame 31. And The protective material 10 is in contact with the steel joinery frame 31 using this force.

  By continuously repeating the rotation operation of the movable lever 5, the steel joinery frame 31 can be lifted and maintained at the same time as shown in FIG. Since the steel joinery frame 31 is tied up with a string, it is prevented from falling down. The jack body 25 is in a state of leaning through the protective material 10 due to the weight of the steel joinery frame 31 hanging on the support portion 9, so that the jack body 25 can always maintain a parallel posture with respect to the steel joinery frame 31. It has become. Moreover, it can hold | maintain in the stable state on a support part by raising by a two-point support of a support part and a protective material. With respect to the lifting direction, it can be adjusted in a stepless manner from being raised slightly in millimeters or less depending on the operation of the movable lever 5 to being smoothly raised in centimeters. However, if the height is higher than the target height, the stopper plate 17 is released and lowered in the lowering direction, and the adjustment handle 14 described later is turned steplessly and smoothly in units of millimeters or less. There is a way to lower.

  Next, the use contents of the adjustment handle will be described. The rod 3 is also rotated by turning the adjustment handle 14 to the left or right in the circumferential direction, and can be lowered while making fine adjustments steplessly depending on the weight of the jack body 25 or the weight of the object to be lifted. ing. As shown in the operation of the stopper mechanism, the jack body 25 maintains its height in a state where the steel joinery frame 31 is lifted by the action of the frictional force applied to a part of the rod 3 by the stopper plate 17. However, since the contact point of the force applied to the rod 3 is slightly shifted by the rotation of the rod 3 in the circumferential direction, it is slightly stepless in units of millimeters or less depending on the weight applied to the jack body 25. Move downwards smoothly and gradually. In this way, the hand jack 1 can be operated in an adjustable manner including fine adjustment in the vertical direction.

  Further, the adjustment in the front-rear and left-right directions is supported by freely moving the position of the base 12 in a state where the steel joinery frame 31 is lifted by the hand jack 1. After being adjusted to the temporarily fixed state in this way, the welding band 32 provided on the back side of the steel joinery frame 31 and the light steel wall base 34 are used for the main fixing by arc welding work using the reinforcing bar 61. Yes. After the attachment is completed, the stopper plate 17 is lowered so that the rod 3 is in a free state so that the hand jack 1 can be removed.

  FIG. 8 shows a temporarily fixed state after the steel jack frame 31 is adjusted to the target position using the hand jack 1 and completed. By using the hand jack 1, it is possible to easily perform work in a clean form without taking up space in this way. If necessary, the wedge can be supported to the extent that it is lightly touched after the adjustment to the target position is completed if the position is difficult to shift during welding.

  FIG. 9 shows a temporarily fixed state after the steel jack frame 39 having a large depth width is adjusted to the target position using the hand jack 1 and completed. When lifting the steel joinery frame 39 having a large depth, it is possible to maintain the height in a stable state by installing and using the hand jack 1 at two locations near both ends of the frame. Yes.

[Embodiment 2]
The hand jack 1 according to the second embodiment is the same as the hand jack 1 used in the first embodiment, and the description of the configuration and operation is omitted.
The hand jack 1 of the present invention is not limited to use for waiting for an object detailed in the first embodiment, but can also be used for pressing or pressing an object.

  As shown in FIG. 10, the anchor bolt is fixed to the floor surface with the hand jack 1 lying sideways so that the surface on which the arm 8 which is the front side of the jack body 25 is provided is the lower surface. When installed so as to be hooked on 72, the steel box 71 placed at the tip of the base 12 can be pushed by sending out the rod 3 by rotating the movable lever 5. From the above contents, for example, it can be used for an object that requires fine adjustment of the position, and can be pressed so that the object does not fall down.

  As described above, the first and second embodiments which are examples of the best mode for carrying out the present invention have been described in detail. However, the specific configuration is not limited to the above-described configuration, and departs from the gist of the present invention. Even if there is a design change within the range not to be included, it is included in the present invention.

  For example, the mounting position and shape of the protective material are not limited to those in which the truncated cone-shaped protective material 10 is provided at the base of the arm 8 as in the illustrated embodiment, but also closer to the center or tip of the arm 8 corresponding to the material to be lifted. The position of the mounting screw 11 of the protective material 10 may be increased by several places, and the position may be changed, or the shape of the protective material may be a quadrangular pyramid or a long rectangular pyramid with a large surface area. . Further, the length of the arm 8 and the rod 3 may be changed according to the place and situation of use, and the shape of the support portion, which is the tip of the arm, may be a shape that is more easily caught.

  Compared to the steel joinery frames 31 and 39 according to the first embodiment, when corresponding to a steel joinery frame that is heavier, a thick material is used to increase the strength of the members constituting the hand jack 1. The number of stopper plates 17 and feed plates 20 may be two, not one, and the frictional force applied to the rod 3 may be increased as in the illustrated embodiment. In addition, it is possible to add reinforcement to the body 2 and the arm 8.

  It is not limited to the attachment of steel joiner frames, but can be adjusted steplessly in both the vertical and vertical directions for many materials such as aluminum and stainless steel frames, and wooden frames, plasterboards, concrete panels, and external wall panels. Therefore, it is possible to provide a hand jack having a compact shape with good operability that can be applied in various areas.

It is a perspective view which shows the hand jack which concerns on Embodiment 1 and 2 of this invention. It is a sectional side view which shows the state at the time of non-operation in the stopper mechanism part of the part fractured | ruptured by the PP line in FIG. 1 which concerns on Embodiment 1 and 2 of this invention. It is a sectional side view which shows the state at the time of operation in the stopper mechanism part of the part fractured | ruptured by the PP line in FIG. 1 which concerns on Embodiment 1 and 2 of this invention. It is a sectional side view which shows the state at the time of non-operation in the rod feed mechanism part of the part fractured | ruptured by the QQ line in FIG. 1 which concerns on Embodiment 1 and 2 of this invention. It is a sectional side view which shows the state at the time of operation in the rod feed mechanism part of the part fractured | ruptured by the QQ line in FIG. 1 which concerns on Embodiment 1 and 2 of this invention. It is side sectional drawing before lifting the steel joinery frame which shows the use condition of the hand jack which concerns on Embodiment 1 of this invention. It is a sectional side view after lifting the steel joinery frame which shows the use condition of the hand jack which concerns on Embodiment 1 of this invention. In FIG. 11 which concerns on Embodiment 1 of this invention, it is a perspective view which shows after the completion of a set at the time of using a hand jack with respect to the steel joinery frame on one side of H part. It is a perspective view which shows after the set completion at the time of using a hand jack with respect to the steel joinery frame with a large depth width which concerns on Embodiment 1 of this invention. It is a sectional side view which shows a state when using the hand jack which concerns on Embodiment 2 of this invention sideways. It is a perspective view which shows the state of the temporary installation of the steel joinery frame which concerns on Embodiment 1 of this invention. In FIG. 11, it is a perspective view which shows the problem at the time of using the conventional wedge with respect to one steel part with respect to the steel joinery frame. In FIG. 11, it is a perspective view which shows the use condition of the conventional wedge with respect to one steel part with respect to the steel joinery frame. In FIG. 11, it is a perspective view which shows the state of the temporary fixation after the completion of the setting at the time of using the conventional wedge with respect to one steel part with respect to the steel joinery frame. It is side sectional drawing which shows the structure and usage condition of the conventional hand jack.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hand jack 2 Jack main body 3 Rod 4 Grip 5 Movable lever 6 Rotating pin 7 Feeding pin 8 Arm 9 Support part 10 Protective material 11 Mounting screw 12 Base 13 Nut 14 Adjustment handle 15 Support metal fitting 16 Through hole 17 Stopper plate 18 Through hole 19 Small spring 20 Feed plate 21 Through hole 22 Fixed plate 23 Large spring 24 Rotating fulcrum 25 Jack body 31 Steel fitting frame 32 Welding band 33 Boring hole 34 Light steel wall base 35 String 36 Opening 37 Concrete floor 38 Ink line 39 Steel joint frame 41-43 Wedge 51 Flat plate 61 Reinforcing bar 71 Steel box 72 Anchor bolt A Up direction B Down direction C Forward direction D Back direction E Left direction F Right direction

Claims (6)

In the type of hand jack that can lift the object steplessly by sending it out by rotating the movable lever, and at the same time maintain its height,
In the hand jack, the main body of the jack, the body part located in the center,
A grip extending in a horizontal direction from a rear portion of the body portion;
An arm located on the front side of the body portion and extending obliquely downward at a steep angle;
Of these, a round rod-shaped rod having a predetermined length is passed through the body portion,
A fixing plate fixed to a predetermined position inside the body portion and inserted into the rod;
A large spring inserted into the rod at a position above the fixed plate;
A feed plate located on top of the spring and inserted into the rod;
A rod feed mechanism section comprising a movable lever for moving the feed plate in a predetermined direction and feeding the rod in a predetermined direction;
A small spring located at the top of the body and inserted into the rod;
A stopper plate located at the top of the small spring and inserted into the rod;
A stopper mechanism portion comprising a support fitting located at one end of the stopper plate and rotatably connecting the stopper plate is configured.
A hand jack characterized in that a base is fixed to the tip of the rod, and an adjustment handle is provided at the other rear end for rotating the rod to slightly displace the rod.   2. The hand jack according to claim 1, wherein when an object to be lifted by turning the movable lever is raised too much from a target height, an adjustment handle provided at the rear end of the rod is rotated in the circumferential direction. A hand jack characterized by being configured to be adjustable in a stepless manner in the lowering direction.   3. The hand jack according to claim 2, wherein a support portion that is a portion to be hooked on an object is formed at a tip of the arm, and the support portion can be freely moved to a position lower than a base fixed to the tip of the rod. A hand jack characterized by being configured to be lowered.   In the hand jack as described in any one of Claims 1-3, the protective material is attached to the base part of the said arm so that the thing to be lifted may not be damaged, Two points of this protective material and the said support part A hand jack configured to be able to maintain a parallel posture with respect to an object to be lifted by lifting with support.   In the hand jack as described in any one of Claims 1-4, the base currently fixed to the front-end | tip of the said rod is detachable, and it can replace | exchange according to the condition of the thing to be lifted, and a floor. Hand jack characterized by being configured to.   The hand jack according to any one of claims 1 to 5, wherein the hand jack of the present invention is placed sideways so that the arm located on the front side of the jack body is the lower surface, and the support portion is placed on the floor surface. When it is installed so as to be hooked to a fixed anchor bolt, it is configured so that the object placed on the tip of the base can be pushed by sending out the rod by rotating the movable lever. Hand jack characterized by.

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